package com.mmall.service.impl;

import com.mmall.common.ServerResponse;
import com.mmall.common.TokenCache;
import com.mmall.dao.UserMapper;
import com.mmall.pojo.User;
import com.mmall.service.IUserService;

import com.mmall.util.MD5Util;
import net.sf.jsqlparser.parser.Token;
import net.sf.jsqlparser.schema.Server;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.web.servlet.tags.EditorAwareTag;
import sun.reflect.generics.repository.ConstructorRepository;
import com.mmall.common.Const;

import java.util.UUID;

/**
 * Created by lenovo on 2018-04-19.
 */
@Service("iUserService")
public class UserServiceImpl implements IUserService {
    @Autowired
    private UserMapper userMapper;

    @Override
    public ServerResponse<User> login(String username, String password) {
        int resultCount = userMapper.checkUsername(username);
        if (resultCount == 0) {
            return ServerResponse.createByErrorMessage("用户名不存在");
        }
        //todo 密码登录MD5
        String md5Password = MD5Util.MD5EncodeUtf8(password);
        User user = userMapper.selectLogin(username, md5Password);
        if (user == null) {
            return ServerResponse.createByErrorMessage("密码错误");
        }

        user.setPassword(org.apache.commons.lang3.StringUtils.EMPTY);
        return ServerResponse.createBySuccess("登录成功", user);
    }

    public ServerResponse<String> register(User user) {
        ServerResponse validResponse = this.checkValid(user.getUsername(), Const.USERNAME);
        if (!validResponse.isSuccess()) {
            return validResponse;
        }
        validResponse = this.checkValid(user.getEmail(), Const.EMAIL);
        if (!validResponse.isSuccess()) {
            return validResponse;
        }
        user.setRole(Const.Role.ROLE_CUSTOMER);
        //MD5加密
        user.setPassword(MD5Util.MD5EncodeUtf8(user.getPassword()));
        int resultCount = userMapper.insert(user);
        if (resultCount == 0) {
            return ServerResponse.createByErrorMessage("注册失败");
        }
        return ServerResponse.createBySuccess("注册成功");
    }

    public ServerResponse<String> checkValid(String str, String type) {
        if (org.apache.commons.lang3.StringUtils.isNoneBlank(type)) {
            //开始校验
            if (Const.USERNAME.equals(type)) {
                int resultCount = userMapper.checkUsername(str);
                if (resultCount > 0) {
                    return ServerResponse.createByErrorMessage("用户名已存在");
                }
            }
            if (Const.EMAIL.equals(type)) {
                int resultCount = userMapper.checkEmail(str);
                if (resultCount > 0) {
                    return ServerResponse.createByErrorMessage("email已存在");
                }
            }
        } else {
            return ServerResponse.createByErrorMessage("参数错误");
        }
        return ServerResponse.createBySuccess("校验成功");
    }

    public ServerResponse selectQuestion(String username) {
        ServerResponse validResponse = this.checkValid(username, Const.USERNAME);
        if (validResponse.isSuccess()) {
            //用户不存在
            return ServerResponse.createByErrorMessage("用户不存在");
        }
        String question = userMapper.selectQuestionByUsername(username);
        if (org.apache.commons.lang3.StringUtils.isNoneBlank(question)) {
            return ServerResponse.createBySuccess(question);
        }
        return ServerResponse.createByErrorMessage("找回密码的问题是空的");
    }



    public ServerResponse<String> CheckAnswer(String username, String question, String answer) {
        int resultCount = userMapper.checkAnswer(username, question, answer);
        if (resultCount > 0) {
            //说明问题及问题答案是这个用户的，并且是正确的
            String forgetToken = UUID.randomUUID().toString();
            TokenCache.setKey(TokenCache.TOKEN_PREFIX+username,forgetToken);
            return ServerResponse.createBySuccess(forgetToken);
        }
        return ServerResponse.createByErrorMessage("问题的答案错误");
    }

    public ServerResponse<String> forgetRestPassword(String username,String passwordNew,String forgetToken){
        if(org.apache.commons.lang3.StringUtils.isBlank(forgetToken)){
            return ServerResponse.createByErrorMessage("参数错误，Token需要传递");
        }
        ServerResponse validResponse = this.checkValid(username, Const.USERNAME);
        if (validResponse.isSuccess()) {
            //用户不存在
            return ServerResponse.createByErrorMessage("用户不存在");
        }
        String token=TokenCache.getKey(TokenCache.TOKEN_PREFIX+username);
        if (org.apache.commons.lang3.StringUtils.isBlank(token)){
            return ServerResponse.createByErrorMessage("token无效或者过期");
        }
        if(org.apache.commons.lang3.StringUtils.equals(forgetToken,token)) {
            String md5Password = MD5Util.MD5EncodeUtf8(passwordNew);
            int rowCount = userMapper.updatePasswordByUsername(username, md5Password);
            if (rowCount > 0) {
                return ServerResponse.createBySuccess("修改密码成功");
            }
        }else{
            return ServerResponse.createByErrorMessage("Token错误，请重新获取重置密码的token");
        }
        return ServerResponse.createByErrorMessage("修改密码失败");
        }

    public ServerResponse<String> resetPassword(String passwordOld,String passwordNew,User user){
        //防止横向越权，要校验一下这个用户的旧密码，一定要指定是这个用户，因为我们会查询一个count（1），如果
        //不指定id，那么结果就是TRUE count>0
        int resultCount=userMapper.checkPassword(MD5Util.MD5EncodeUtf8(passwordOld),user.getId());
        if(resultCount==0){
            return ServerResponse.createByErrorMessage("旧密码错误");
        }
        user.setPassword(MD5Util.MD5EncodeUtf8(passwordNew));
        int updateCount=userMapper.updateByPrimaryKeySelective(user);
        if(updateCount>0){
            return ServerResponse.createBySuccessMessage("密码更新成功");
        }
        return ServerResponse.createByErrorMessage("m密码更新失败");
    }

    public ServerResponse<User> updateInformation(User user){
        //username是不能被更新的
        //email也要进行一个校验，校验新的email是不是已经存在，并且存在的email如果相同的话，不能是我们当前这个用户的。
        int resultCount=userMapper.checkEmailByUserId(user.getEmail(),user.getId());
        if(resultCount>0){
            return ServerResponse.createByErrorMessage("email已经存在，请更换email在尝试更新");
        }
        User updateUser=new User();
        updateUser.setId(user.getId());
        updateUser.setEmail(user.getEmail());
        updateUser.setPhone(user.getPhone());
        updateUser.setQuestion(user.getQuestion());
        updateUser.setAnswer(user.getAnswer());
        int updateCount = userMapper.updateByPrimaryKeySelective(updateUser);
        if(updateCount > 0){
            return ServerResponse.createBySuccess("更新个人信息成功",updateUser);
        }
        return ServerResponse.createByErrorMessage("更新个人信息失败");
    }

    public ServerResponse<User> getInformation(Integer userId){
        User user= userMapper.selectByPrimaryKey(userId);
        if(user==null){
            return ServerResponse.createByErrorMessage("找不到当前用户");
        }
        user.setPassword(org.apache.commons.lang3.StringUtils.EMPTY);
        return ServerResponse.createBySuccess(user);
    }


    //backend
    /*
    校验是否是管理员
     */
    public ServerResponse checkAdminRole(User user){
        if(user!=null&&user.getRole().intValue()==Const.Role.ROLE_ADMIN){
            return ServerResponse.createBySuccess();
        }
        return ServerResponse.createByError();
    }

    }

